London's Pulse: Medical Officer of Health reports 1848-1972
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Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
Orpington 1952
[Report of the Medical Officer of Health for Orpington]
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TABLE XII
AVERAGE RESULTS OP THE CHEMICAL AND BACTERIOLOGICAL EXAMINATION OP THE WATER SUPPLIED TO ORPINGTON URBAN DISTRICT COUNCIL DURING 1952.
Parts per Million (unless otherwise stated)
| Description of Samples | No. of Samples | Ammoniacal Nitrogen | Albuminoid Nitrogen Oxidised Nitrite | Nitrogen Nitrate | Chlorides as CI. | Oxygen abs. from Permanganate 3 hrs at 80° F | Colour m.m brown 2 ft. tube Burgess's Tintometer Hardness (total) | Hardness Permanent | pH Value | Magnesium | Silica as Sio2 | Fluorides F | Conductivity | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Orpington Well | 4 | 0.004 | 0.035 | - | 6.9 | 15.4 | 0.05 | 2 | 284 | 43 | 7. 3 | 2.6 | 12 | 0.03 | 450 | ||
| North Orpington Well | 4 | 0.010 | 0.035 | - | 4.9 | 13. 9 | 0.05 | Nil | 267 | 36 | 7.3 | 2. 5 | 14 | 0.04 | 425 | ||
| Jewels Wood Well | 2 | Nil | 0.025 | - | 2.9 | 9.8 | Nil | Nil | 240 | 22 | 7.4 | 2.4 | 9 | 0.03 | 350 | ||
| Sundridge Well | 4 | 0.025 | 0. 030 | - | 2.5 | 17.0 | 0.07 | Nil | 214 | 45 | 7.5 | 4.0 | 19 | 0.07 | 375 | ||
| Eynsford Well | 4 | 0.004 | 0.033 | - | 4. 3 | 14.9 | 0.09 | Nil | 266 | 41 | 7.3 | 3.2 | 14 | 0. 04 | 450 | ||
| Shorthands Well | 4 | 0.007 | 0.025 | - | 5.4 | 18.6 | 0. 19 | Nil | 282 | 61 | 7.4 | 5.8 | 16 | 0.05 | 450 | ||
| Bexley Well | 5 | 0,011 | 0.037 | - | 6. 2 | 16. 1 | 0.07 | Nil | 282 | 50 | 7.3 | 3.6 | 17 | 0.05 | 475 | ||
| BACTERIOLOGICAL RESULTS | |||||||||||||||||
| Plate Count (Average per Millilitre) Colonies counted on Agar | Bact. Coli Test | ||||||||||||||||
| Percentage of Samples Negative in 100 ml. | Average number of Bact. Coli per 100 ml. | ||||||||||||||||
| 22° C (3 days) | 37° c (20-24 hrs) | ||||||||||||||||
| Orpington Well | 253 | 896. 5 | 35.0 | 100.0 | Nil | ||||||||||||
| North Orpington Well | 252 | 37.0 | 3. 3 | 100.0 | Nil | ||||||||||||
| Jewels Wood Well | 90 | 2.6 | 0. 2 | 100.0 | Nil | ||||||||||||
| Sundridge Well | 255 | 12.0 | 0.7 | 100.0 | Nil | ||||||||||||
| Eynsford Well | 380 | 344. 3 | 1.8 | 100.0 | Nil | ||||||||||||
| Shorthands Well | 273 | 5.7 | 0.5 | 100.0 | Nil | ||||||||||||
| Bexley Well | 261 | 10.9 | 0.6 | 100.0 | Nil | ||||||||||||